Nice snatch David.
Biggest thing to my eyes is you are catching the bar with some of the weight shifted to your toes. Your feet shifted back about an inch or two when they left the ground. That will force you onto your toes when you catch the bar (makes it harder to stabilize). Trying to drive the weight into your heels by actively pushing your knees back during the first pull will help you a lot.
Be conscious of the catching position and try and keep the weight in your heels on that. Snatch balance could be beneficial for you as well as snatch push press. Both of these will help strengthen your shoulders in the above-the-head snatch grip positions.